Harmful chemicals in the food chain: why humans hold the most

The same question, asked 4 times: 2022*, 2023*, 2024*, 2025. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
2022
1 (b) $Human beings are most adversely affected by the Biological Magnification. State the reason. Why can ordinary washing of the edibles (fruits and vegetables) not reduce the effect of biological magnification ?$
Question 2
2023
33 $Explain how some harmful chemicals enter our bodies through the food chain. Why is the concentration of these harmful chemicals found to be maximum in human beings ?$
Question 3
2024
33 $Use of pesticides to protect our crops affect organisms at various trophic levels especially human beings. Name the phenomenon involved and explain how does it happen.$
Question 4
2025
33 $Some harmful chemicals get accumulated in human bodies through the food chain. Name this phenomenon. Explain the reason of maximum concentration of these chemicals found in our bodies.$

Question 1